Classifications

• • C—CHEMISTRY; METALLURGY
  • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
  • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
  • C04B24/00—Use of organic materials as active ingredients for mortars, concrete or artificial stone, e.g. plasticisers
  • C04B24/24—Macromolecular compounds
• • C—CHEMISTRY; METALLURGY
  • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
  • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
  • C04B40/00—Processes, in general, for influencing or modifying the properties of mortars, concrete or artificial stone compositions, e.g. their setting or hardening ability
  • C04B40/0028—Aspects relating to the mixing step of the mortar preparation
  • C04B40/0039—Premixtures of ingredients
• • C—CHEMISTRY; METALLURGY
  • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
  • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
  • C04B22/00—Use of inorganic materials as active ingredients for mortars, concrete or artificial stone, e.g. accelerators, shrinkage compensating agents
  • C04B22/08—Acids or salts thereof
  • C04B22/12—Acids or salts thereof containing halogen in the anion
• • C—CHEMISTRY; METALLURGY
  • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
  • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
  • C04B40/00—Processes, in general, for influencing or modifying the properties of mortars, concrete or artificial stone compositions, e.g. their setting or hardening ability
• • C—CHEMISTRY; METALLURGY
  • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
  • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
  • C04B40/00—Processes, in general, for influencing or modifying the properties of mortars, concrete or artificial stone compositions, e.g. their setting or hardening ability
  • C04B40/0028—Aspects relating to the mixing step of the mortar preparation
  • C04B40/0039—Premixtures of ingredients
  • C04B40/0042—Powdery mixtures
• • E—FIXED CONSTRUCTIONS
  • E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
  • E01C—CONSTRUCTION OF, OR SURFACES FOR, ROADS, SPORTS GROUNDS, OR THE LIKE; MACHINES OR AUXILIARY TOOLS FOR CONSTRUCTION OR REPAIR
  • E01C7/00—Coherent pavings made in situ
  • E01C7/08—Coherent pavings made in situ made of road-metal and binders
  • E01C7/10—Coherent pavings made in situ made of road-metal and binders of road-metal and cement or like binders
• • C—CHEMISTRY; METALLURGY
  • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
  • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
  • C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
  • C04B2111/00474—Uses not provided for elsewhere in C04B2111/00
  • C04B2111/0075—Uses not provided for elsewhere in C04B2111/00 for road construction

Definitions

• the present invention relates to a dispersion for use in a concrete mixture, further to a concrete mixture, a process for its preparation and a use.
• EP 0 868 407 B1 discloses a dispersion for concrete mix of the type in question. It is desirable to develop and improve this concrete mix and expand its range of application.
• the substance mixture consists mainly of two components, of which one component consists predominantly of chloride salts and the other component is an alkali metal silicate (water glass), preferably sodium silicate.
• the two components are premixed and then added to the concrete mix of cement, water and sand for use in road construction, for example.
• a mortar composition which is prepared by means of a polymeric dispersion.
• the from the Mortar composition prepared substrates have a high elasticity and resist in practice strong vibrations and bends.
• the mortar composition contains a high proportion of polymer (up to 30% by weight) so that it is not inexpensive to prepare compared to bitumen.
• the high flexibility of the substrates made from this mortar composition prohibits their use in road construction.
• Japanese Patent Application No. 85-167828 also discloses a polymer-containing cementitious mixture which, after curing, has improved elastic properties and is suitable for use as a heat-resistant elastic filling material.
• this cement mixture is not suitable for use in road construction due to its high polymer content.
• the object of the invention is to further develop a harmless to the environment concrete mix, which has a reduced shrinkage during curing, increased flexibility of the final product after curing and has a higher long-term stability.
• the concrete mixture according to the invention is preferably prepared by mixing the cement, the filler and optionally the water, and then adding the aqueous dispersion. Any other order is also possible.
• Another object of the invention is the production of building materials, preferably plates or stones, from the concrete mixture according to the invention containing the dispersion.
• the concrete mixture according to the invention can furthermore be used for any type of concrete construction, preferably for road, road and fastening construction. Another object of the invention is therefore this use and the appropriate construction measure, preferably in the field of road, path and terrain attachment.
• the advantage of the dispersion according to the invention is that it can be produced precisely in one place, is easy to transport and can be processed conveniently at the actual site of use, and that the concrete mixture can be produced.
• the concrete mixture according to the invention cures quickly.
• the aqueous dispersion is harmless to the environment. It is not classified as a dangerous substance, so it can be processed without any protective measure.
• the dispersion can be stored quite well over a long time.
• the usual sands but also any type of soil, contaminated or uncontaminated, and / or materials such as bauxite, latent, volcanic ash, pumice and ash from incinerators can be used.
• building materials and concrete components of any kind preferably road and pavement can be made by the excavation of the construction site and / or sandy or soil-like Materials that are available in the construction site area are used as filler in the concrete mix instead of the usual fillers.
• cellulose is particularly suitable methylcellulose.
• Dow Methocell J 75 MS manufacturer Dow Europe S.A., CH-8810 Horgen, Switzerland, is proposed.
• the sodium hydroxide is preferably in the form of whitish pellets. It is a standard industrial product.
• the calcium chloride is preferably in the form of a white powder, again this is a standard industrial product.
• the styrene-butadiene preferably has a solids content of 30-80 wt .-%, in particular 40-60%, preferably 50%, balance water.
• the solids content is formed by rubber.
• the supplier is the aforementioned Dow Europe S.A ..
• a dissolver In the preparation of the dispersion is preferably used a dissolver with a number of revolutions of 1,000 to 1,500 U / min.
• a dissolver has the advantage that no air is mixed in. In the production foaming should be avoided. Defoamers must not be used under any circumstances.
• the water is completely filled into the machine, the machine is started or running before, it runs through to the end of production. Then the cellulose material is slowly sprinkled in, while a lump formation is to be avoided. It is waited until completely mixed and all lumps are dissolved. Finally, the sodium hydroxide, which is in the form of whitish pellets, is slowly poured in until the mixture stiffens. It is waited until a consistency similar to a wallpaper paste is achieved. It is then a slightly grainy structure, tough consistency and clear color. Now, the calcium chloride, which is present as a white powder, slowly stirred, finally, the styrene-butadiene is stirred slowly. Finally, the preservative is slow stirred, the mixture is doing something thinner. The mixture is finally stirred for two to three minutes further, the machine can then be turned off, the product can be bottled.
• a dry mixture is first prepared. It is easy to transport and eliminates the weight of the water. This dry mixture is mixed on site with water, for example 1 to 9, ie one part by weight of dry dispersion and 9 parts by weight of water. The dry mix can also be added to the cement.
• the ingredients b. to e. mixed together in the stated proportions by weight in dry form are hydrous.
• the powder mixture is now brought together in the specified parts by weight, the mixture is carried out in a forced mixer, for example, a kneader is used.
• the preservative is also to be entered, it is added as a non-aqueous preservative, for example, the o. G. Preservative freeze-dried. It can alternatively be used as a preservative potassium sorbate.
• the products produced from the dust mixture according to the invention show no cracks. They also show no efflorescence.
• One concrete mix was left as it was while the other concrete mix was mixed with one liter of a dispersion according to the invention composed as follows: a. 90% by weight of water, b. 1% by weight of cellulose, c. 2% by weight of sodium hydroxide, d. 1.2% by weight of calcium chloride and e. 7.4 wt .-% styrene-butadiene
• the concrete mixture according to the invention and the conventional concrete mixture were each poured into wooden molds with the dimensions 50 ⁇ 20 ⁇ 1 cm (length, width, depth), in which the concrete mixture in each case hardened. Each 10 plates were made.
• three concrete mixes were produced, each containing 20 kg of cement and 5 liters of water.
• a filler mixture contained mixture 1 100 liters of commercial construction sand, mixture 2 100 liters of topsoil from a construction site and mix 3 100 liters of ash from an incinerator.
• the concrete mixtures were each intimately premixed in a concrete mixer and then mixed in each case in a vat with one liter of the dispersion according to Example 1 and poured into the molds described in Example 1 into plates in which cured the concrete mixtures.

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• Chemical & Material Sciences (AREA)
• Engineering & Computer Science (AREA)
• Ceramic Engineering (AREA)
• Structural Engineering (AREA)
• Materials Engineering (AREA)
• Organic Chemistry (AREA)
• Architecture (AREA)
• Civil Engineering (AREA)
• Inorganic Chemistry (AREA)
• Compositions Of Macromolecular Compounds (AREA)
• Curing Cements, Concrete, And Artificial Stone (AREA)

Priority Applications (3)

Applications Claiming Priority (2)

Publications (1)

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ID=41057632

Family Applications (1)

Country Status (6)

Cited By (1)

Citations (7)

Family Cites Families (4)

• 2008
  • 2008-08-13 DE DE102008038904A patent/DE102008038904A1/de not_active Withdrawn
• 2009
  • 2009-06-24 WO PCT/EP2009/057874 patent/WO2010018020A1/de active Application Filing
  • 2009-06-24 EP EP09779920A patent/EP2313354A1/de not_active Withdrawn
  • 2009-06-24 KR KR1020117005843A patent/KR20110063638A/ko not_active Application Discontinuation
  • 2009-06-24 EA EA201170326A patent/EA021307B1/ru not_active IP Right Cessation
• 2011
  • 2011-02-10 ZA ZA2011/01085A patent/ZA201101085B/en unknown

Patent Citations (7)

Non-Patent Citations (1)

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